Monstera Plant Food: What This Tropical Giant Actually Needs in Winter

Everybody wants a Monstera. Those big glossy leaves with the holes punched through them are pretty much the mascot of the whole houseplant craze, and the good news is they're not hard to keep alive.

Feeding is where it goes sideways.

It happens every year around now. The furnace kicks on for the first chilly October night here in Kansas City, the plant quits putting out new leaves, and somebody looks at it and thinks, oh no, it's hungry. So out comes the fertilizer. Then more fertilizer, because the first round didn't seem to do anything.

By Thanksgiving the leaf edges are crispy and there's a white crust on top of the soil like somebody sprinkled salt on it. Which, more or less, somebody did.

I'll own that I've made this exact mistake. It's a little embarrassing for a chemical engineer who should know what salt does to roots, but there you go. The plant wasn't being a diva. I was feeding a resting tropical like it was a tomato in August.

Once you feed a Monstera on its own clock, it's one of the most forgiving big plants you can own.

Do Monsteras Even Need Fertilizer?

They do, at least while they're growing. A Monstera in spring and summer will put out bigger, darker leaves if you feed it.

Just not a lot at once.

It helps to picture where these plants come from. Monstera deliciosa is a vine from the rainforests of southern Mexico and Central America, and out there it climbs 70 feet up tree trunks, living off rainwater and whatever rotting leaves collect around its roots. Nobody's dumping a scoop of blue crystals on it. It's related to the philodendron and the pothos, and that whole family eats the same way: a little bit, pretty often.

A few reasons a potted one benefits from feeding:

• After a year or two in the same pot, most of the food in the original mix is gone.
• Big leaves are expensive to build. Spring and summer is when it's spending.
• Color. A well-fed Monstera stays that deep green instead of fading toward lime.

Monsteras are climbing aroids. They want a chunky, airy mix and a gentle, steady feed.

Why Fall and Winter Change Everything

If you skim the rest of this, fine. Read this part.

Your Monstera in July and your Monstera in January might as well be two different plants. When fall shows up indoors, a bunch of things shift on it at once:

• Less light. The days get short and gray, and a plant can only grow as fast as its light lets it.
• Dry heat. Once the furnace runs, the air in most houses gets desert-dry, and big leaves lose water fast. Brown edges usually start here.
• Cold spots near windows and hot spots near vents, and below about 50°F a Monstera just stops growing altogether.

So it slows way down and uses almost no food. Anything you add beyond that doesn't disappear. It sits in the pot and builds up as salt, week after week, until the roots start to burn.

That's the whole reason a feeding routine that worked great all summer turns on you in November. Backing off isn't neglecting the plant. You're just keeping up with it, the same way you'd handle any tropical during winter indoor plant care.

In winter a Monstera rests. Bright light and a lighter hand on feeding carry it through.

What Kind of Monstera Plant Food to Use

Brand matters less than type. You want something mild enough that you can't really hurt the plant with it.

So skip the bloom boosters. Monsteras almost never flower indoors, which makes a high-phosphorus flower formula kind of pointless, and those products tend to be concentrated salts. Thick aroid roots hate that.

Bear with me for one nerdy minute, because this is the part I care about most. Plant Juice isn't a salt. It's a living liquid, and when we sent it to an independent lab they counted 291 species of microbes in it. A few of them are worth knowing by name if you grow aroids:

• Pseudomonas putida is one of the heavy hitters in the bottle, around 1.2 million cells per mL. Researchers have been studying it as a root helper for decades.
• Devosia insulae moves in on the roots themselves, which is exactly where you want the help.
• Most of the rest pitch in too. About 84% of the species can make natural rooting hormones, and 82% can dial down ethylene, the hormone plants pump out when they're stressed. Research on plant growth-promoting bacteria links both to tougher roots.

What that means at the pot level: the food trickles out slowly as the microbes do their thing, which is a lot closer to how a Monstera eats in the jungle than a shot of synthetic salt is. It also gives you a wide margin for error. If you're a heavy-handed feeder (no judgment, I am too), that margin matters. There's more on why in living soil explained.

I should say this too, since I make the stuff: no fertilizer on earth will rescue a Monstera sitting in soggy, dense soil. The roots need air. A chunky aroid mix for Monstera fixes that, or you can mix your own with our aroid soil mix recipe.

How Often and How Much to Feed a Monstera

Throw out the idea of a weekly schedule. The season decides.

That's it. Really.

Forget a feeding? The plant won't notice. An underfed Monstera bounces back the minute you pick up where you left off, while an overfed one can take a whole season to recover, so if you're going to miss, miss on the light side. The same thinking works for everything else on your windowsill, and our houseplant fertilizer guide walks through it plant by plant.

Fed on its own seasonal schedule, a Monstera holds its color and keeps unfurling big leaves.

Will Fertilizer Make the Leaves Split?

Nope. I wish it were that easy.

The holes and splits (the fancy word is fenestrations) come with age, and they need good light to form. University of Wisconsin Extension says flat out that a Monstera won't make them when the light is too low. A young plant is going to put out plain, solid leaves no matter what you feed it.

Want more of those split leaves? Start with the window. Your brightest spot is where it belongs, winter especially. A moss pole or a sturdy stake helps too, since Monsteras that get to climb tend to grow up faster, leaf-wise. Then keep the feeding steady in spring and summer so the plant has something to build with.

Food grows the plant. Light shapes the leaf.

The Overfeeding Trap (and How to Spot It)

More Monsteras get into trouble from too much food than too little. By a mile.

Watch for these:

• A white, crusty film on top of the soil. That's leftover fertilizer salt, and it usually means the roots are getting scorched underneath.
• Crispy brown edges. Dry furnace air makes this worse, so it's often both.
• New leaves that come in pale and floppy on long stems, which is what you get when you push food into a plant that doesn't have the light to use it.
• Yellow leaves. This is the sneaky one, because people read yellow as hungry and feed more. If you're not sure what's behind it, our guide to yellow leaves on plants will help you narrow it down.

If you spot that crust, put the fertilizer away. Flush the pot in the sink or tub, running plain water through until it pours out the bottom for a good minute, and then give the plant a month off. Curious where the line actually is? We dig into it in how much fertilizer is too much.

Yellow leaves, brown edges, and a crusty soil surface usually mean too much, not too little.

How to Feed a Monstera Without Wrecking It

Once you get the hang of it, there's really nothing to it. These are the habits I'd keep:

• Water first, then feed (or just mix the food into a regular watering). Hitting bone-dry roots with fertilizer is how you get burn spots.
• Feed when you see a new leaf unrolling. If nothing's happening in January, wait.
• Go by the plant, not the calendar. The table above is a starting point, not a law.
• Every couple of months, flush the pot with plain water. Takes five minutes.
• Hold off on repotting until spring. Roots circling the bottom of the pot do mean it's time for repotting into fresh aroid mix, but doing it in fall stresses a plant that's already trying to wind down.

A well-diluted, gentle organic feed on damp soil is all a Monstera asks for.

Get those down and feeding stops being the scary part. If your Monstera's still pouting and you're pretty sure it's not food, it's probably light, water, or dry air. The full Monstera care guide covers all of it, and so does our piece on humidity for houseplants.

Oh, and if you've got a variegated one like the beauty at the top of this post, go even easier on it. Those white patches can't make food, so the plant runs on less. We've got tips on keeping variegated plants vibrant.

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Whole house full of plants? The Plant Care Kit will get your Monstera and the rest of the crew through fall and into spring.

What Monstera Growers Say

You don't have to take my word for it. I'm biased. These folks aren't.

Rated 4.65 out of 5 across 1,793 verified Plant Juice reviews.

Frequently Asked Questions

Feed Gently, Let It Rest, Enjoy the Big Leaves

Monsteras really are as easy as everyone says. Most of the trouble starts when we love them a little too hard at the wrong time of year.

Feed it gently while it's growing. When the days get short, back way off. Park it in your brightest window, keep the air from getting bone dry, and when it takes the winter off, let it. Somewhere around March you'll catch a new leaf unrolling, and it'll probably have more splits than the last one.

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Sources & further reading: University of Wisconsin–Madison Division of Extension, Swiss-Cheese Plant, Monstera deliciosa; Missouri Botanical Garden, Monstera deliciosa; Glick, B.R. (2012), Plant Growth-Promoting Bacteria: Mechanisms and Applications, Scientifica.